@inproceedings{liu-etal-2026-heterogeneous,
    title = "Heterogeneous Adaptive Policy Optimization: Tailoring Optimization to Every Token{'}s Nature",
    author = "Liu, Zheng  and
      Liu, Mengjie  and
      Wen, Siwei  and
      Cai, Mengzhang  and
      Cui, Bin  and
      He, Conghui  and
      Zhang, Wentao",
    editor = "Liakata, Maria  and
      Moreira, Viviane P.  and
      Zhang, Jiajun  and
      Jurgens, David",
    booktitle = "Proceedings of the 64th Annual Meeting of the {A}ssociation for {C}omputational {L}inguistics (Volume 1: Long Papers)",
    month = jul,
    year = "2026",
    address = "San Diego, California, United States",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-acl/2026.acl-long.272/",
    pages = "6023--6045",
    ISBN = "979-8-89176-390-6"
}